clark



v .s n. Y e itt-teh tetes stmt ffies.,

J'. K. CLARK, or Mourir PLEASANT, te WA. Leners Pazmfzvo. 62,817, ummm- 01, 12, 1867.

IMPROVED WINDOW-SASH LOCK.

'.lO ALL WHOM IT MAY CGNGEN:

Be it known that I, J.. K. CLARK, of Mount Pleasant, in the county of Henry, and Stntetof Iowa, have invented n, new and useful improvement in WinGOW-Snsh Locks; and I do lhereby declare that thetfollowing-is :t full, clear, und exact description thereof, which will enable those skilled i-n the nrt to molte and use the suino, reference being had to the accompanying drawings, forming part of this specification, in wvhicl1- Figure l is a. front view of my'improved sash lock attached to a,-Window.

lFigure 2is un inside end view of the same. I

Figure 3 is on inside viewof the lock detached.

' Similar letters of reference indicate'eerresloondin,g` parts.

This invention relates to nin improvement iu winch'mf-snshlooks or fnstenings; and consists in a, deviceI secured to one sid-c of the sash, wherein two friction-rol1ers are hung upon the ends of two connectedV levers in such manner that the rollers will spread apart and' bear against the window frame so :is to stop themovement of the sash nt my desired point by grnvitntion, while by touching a. handle on the connected leviers therelle'rsv muy be withdrawn from the frame and the sash be relieved to move or down. The device is very simple, and' may be mode of brass, cust iron, or :my cheap metal, and finished in japon or silver plated,-n.nd may' befnrnished uit a. very moderate price.

A represents the Shell or supporting body of the lock, inode about two inches and one-holt` long, one'inch Wide, and three-quarters of an inch thick', which shell is secured to the left-hond side of a. window sash with n single screw, a, nnd'two steedy-pins, Zz as shown in iig. 2. The inside of the shellAis formed with two curved.

inclines, e c', running from the ends to the centre, und htving their fece'sor planes opening toward the si'dewhch: goes next the window frame, as shown c'lea-rly in figs. 2 and .3. Two rollers are plooi-nlV inside of the shell A, a-gairstthe inelines c e', the upper roller d being pivoted to the end of a. lever, g, and the' lower lever d being pivoted tothe endo` a. lever, g. The lever g is pivotecl et its outer end to the lever g just inside of a button handle, It, on its outer end. y Both levers ere'thin flat plates, which .pass under. the upper' side or plete of the shell A, in a, suitable slot for spreading und moving to and from each other when operated as hereinafter described. In the upper side of the shclVA nre two slots, e e', made parallel to the inelines e e', which serve es guides for the pins z' il, und secure the levers g gf to the rollers 0l d,.a.nd on which the rollers turn. The weight of the lower level' g and roller d is greater than thnt of the upper lever g and rel-ler d, so es to Vctusev the roller d to fall of itself, when the lock is attached tothe sash, down to thc lower end of the incline e', and thus spread the levers gg apart find mise the roller g .to the upper end of the inclinec, by which action of the rollerstheynre always in position to benl` against the window frame :tnd'hold'the sash et any desired point, ns shown in o'. 1, except when the pressure el' the rollers is relieved by touching the button handle 7L and pushing it upwnrd,'se es' to close the levers yg', :ind thus withdrew the rollers ,.f/'g 'within the shell A, to the bottoni of theinelines c 0', when the sash muy he moved up and down. i

Having thus described my invention, what I el-.tui es new, and desire to secure by Letters lfzttent, is-

The connected levers ,fj g', in combina-tion with the '1iction-i'elle1's Z (Z,'1noving on inelines e o in the shell A, nrrnnged und operating ns und for thc purposes herein described. I

J. K. CLARK.

Witnesses:

JAS. B. SHAW, J'. G. VANcIsE. 

